/**
 * Created by jiachenpan on 16/11/18.
 */

export function parseTime(time, cFormat) {
    if (arguments.length === 0) {
        return null;
    }
    const format = cFormat || "{y}-{m}-{d} {h}:{i}:{s}";
    let date;
    if (typeof time === "object") {
        date = time;
    } else {
        if (("" + time).length === 10) time = parseInt(time) * 1000;
        date = new Date(time);
    }
    const formatObj = {
        y: date.getFullYear(),
        m: date.getMonth() + 1,
        d: date.getDate(),
        h: date.getHours(),
        i: date.getMinutes(),
        s: date.getSeconds(),
        a: date.getDay()
    };
    const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
        let value = formatObj[key];
        // Note: getDay() returns 0 on Sunday
        if (key === "a") {
            return ["日", "一", "二", "三", "四", "五", "六"][value];
        }
        if (result.length > 0 && value < 10) {
            value = "0" + value;
        }
        return value || 0;
    });
    return time_str;
}

export function formatTime(time, option) {
    time = +time * 1000;
    const d = new Date(time);
    const now = Date.now();

    const diff = (now - d) / 1000;

    if (diff < 30) {
        return "刚刚";
    } else if (diff < 3600) {
        // less 1 hour
        return Math.ceil(diff / 60) + "分钟前";
    } else if (diff < 3600 * 24) {
        return Math.ceil(diff / 3600) + "小时前";
    } else if (diff < 3600 * 24 * 2) {
        return "1天前";
    }
    if (option) {
        return parseTime(time, option);
    } else {
        return (
            d.getMonth() +
            1 +
            "月" +
            d.getDate() +
            "日" +
            d.getHours() +
            "时" +
            d.getMinutes() +
            "分"
        );
    }
}

export function timeFormat(time, formatstr = "YYYY-MM-dd") {
    let numFormat = n => (n > 9 ? n : `0${n}`);
    let yearFormat = n => (n % 100 > 9 ? n % 100 : `0${n % 100}`);
    let year = time.getFullYear(),
        month = time.getMonth() + 1,
        date = time.getDate(),
        hour = time.getHours(),
        min = time.getMinutes(),
        seconds = time.getSeconds();

    formatstr = formatstr.replace(/yyyy|YYYY/, year);
    formatstr = formatstr.replace(/yy|YY/, yearFormat(year));
    formatstr = formatstr.replace(/MM/, numFormat(month));
    formatstr = formatstr.replace(/M/, month);
    formatstr = formatstr.replace(/dd|DD/, numFormat(date));
    formatstr = formatstr.replace(/d|D/, date);
    formatstr = formatstr.replace(/hh|HH/, numFormat(hour));
    formatstr = formatstr.replace(/h|H/, hour);
    formatstr = formatstr.replace(/mm/, numFormat(min));
    formatstr = formatstr.replace(/m/, min);
    formatstr = formatstr.replace(/ss|SS/, numFormat(seconds));
    formatstr = formatstr.replace(/s|S/, seconds);

    return formatstr;
}

export function isoTimeFormat(time, formatstr = "YYYY-MM-dd") {
    var tzoffset = new Date().getTimezoneOffset() * 60000; //offset in milliseconds
    console.log("tzoffset: ", tzoffset);
    return new Date(time.getTime() - tzoffset * 2)
        .toISOString()
        .slice(0, 10)
        .replace("T", " ");
}

export function isExternal(path) {
    return /^(https?:|mailto:|tel:)/.test(path);
}

export function random(n = 3) {
    // 生成n位长度的字符串
    var str = "abcdefghijklmnopqrstuvwxyz0123456789"; // 可以作为常量放到random外面
    var result = "";
    for (var i = 0; i < n; i++) {
        result += str[parseInt(Math.random() * str.length)];
    }
    return result;
}

export function toChinesNum(num) {
    let changeNum = ["零", "一", "二", "三", "四", "五", "六", "七", "八", "九"];
    let unit = ["", "十", "百", "千", "万"];
    num = parseInt(num);
    let getWan = temp => {
        let strArr = temp
            .toString()
            .split("")
            .reverse();
        let newNum = "";
        for (var i = 0; i < strArr.length; i++) {
            newNum =
                (i == 0 && strArr[i] == 0 ?
                    "" :
                    i > 0 && strArr[i] == 0 && strArr[i - 1] == 0 ?
                    "" :
                    changeNum[strArr[i]] + (strArr[i] == 0 ? unit[0] : unit[i])) +
                newNum;
        }
        return newNum;
    };
    let overWan = Math.floor(num / 10000);
    let noWan = num % 10000;
    if (noWan.toString().length < 4) {
        noWan = "0" + noWan;
    }
    return overWan ? getWan(overWan) + "万" + getWan(noWan) : getWan(num);
}

export function toChineseText(num) {
    let tmpText = toChinesNum(num);

    return tmpText.length === 2 && tmpText[0] === "一" ?
        tmpText.slice(1) :
        tmpText;
}